So, calling a jewish person anti-semitic isn't accusing them of being self hating? That's such a profoundly dishonest argument.
No it isn't, you just don't understand the self-hating Jew slur. Self hating Jew is a 'race traitor's trope. Jews can be racist to other Jews, and one of the more common ways this has manifested is the self hating Jew trope. I don't think bower is a self hating Jew, I think he's a Jew who said a racist comment to another Jew.
Who is this 'mainstream Jewry' you expect me to ask and why do only their views matter? Are the board of directors included in this 'mainstream Jewry,' who a previous poster pointed out were refusing to talk to Corbyn at the time anyway? Who decides who the mainstream are? Are views outside of it not ok? Should Corbyn ignore his own constituents who had given him an invite to their Seder? Should an MP not mix with his constituents? Or just if they don't fit into the mainstream or whatever? Why should Corbyn care about the 'mainstream' anyway when the mainstream in British politics is partly why we're in such a fucking mess (to be clear, I don't mean mainstream Jewry is a cause or anything. More the general political mainstream and the kind of views that are allowed to dominate in the media discourse - the overton window if you will).
He's always cared most about marginalised voices so good on him for going and enjoying a nice Seder.
When Kanye West and Donald trump hung out, did you defend him? Was it appropriate for either Trump or West to claim they were representing the relationship black people had with the republican party? No, of course you didn't. Because it wasn't. And it's the same situation with Jewdas.
Mainstream Jewry in the UK is not a monolith but it is largely homogenous. The facts speak for themselves. 85% of British Jews feel that Corbyn is a racist, 90% of them support the state of Israel's right to exist, so how is a tiny group who believe the opposite of that in any way representative and why is it appropriate for Corbyn to say there's no problem, I met these Jews for a Seder, as if that puts things to bed?
He demonstrably does not have the support of British Jews. For reasons I've outlined, which keep getting ignored.
So far as I'm concerned Jewdas are largely an irrelevance, but to paint it as if they're not an extreme tangent of a tiny minority is just disengenous.